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28 May 2026

Pistachio shells: how to transform them into enriching powder to improve your garden soil

Pistachio shells, often thrown away without a second thought, hide unsuspected potential for your garden. Rich in calcium, potassium, and phosphorus, these resistant shells can become a valuable amendment for your soil. But how do you transform this waste into enriching powder, and above all, what precautions should you take before using them?

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Illustration image © TopTenPlay
Symbolbild © TopTenPlay

The pistachio shell is not inert waste. It is…

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